Usage: $csr foo.cs in in1 ...

csr.sh

#!/bin/sh
mcs -r:System.Numerics $1 -out:out.exe
if [ "$?" -eq 1 ]; then
    exit 1
fi
shift
if [ "$1" == "" ]; then
    { time mono out.exe ; }
    if [ "$?" -eq 1 ]; then
        rm out.exe
        exit 1
    fi
    rm out.exe
    exit 0
fi
while [ "$1" != "" ]
do
    { time mono out.exe < $1 ; }
    if [ "$?" -eq 1 ]; then
        rm out.exe
        exit 1
    fi
    echo "------------------------------"
    shift
done
rm out.exe
exit 0